Electrical Technical Detail Main

GENERATOR

1. Type & cooling methodType QFSN-300-2Cooling method Stator winding and terminal bushing are

water inner-cooled, rotor winding is hydrogen inner-cooled and stator core hydrogen cooled

Rated H2 pressure 0.31 MPa (g) or 3.1 KSC

2. Basic technical dataRated capacity 353 MVARated capacity 300 MWRated stator voltage 20 KVRated stator current 10189 ARated speed 3000 RPMRated frequency 50 HzEfficiency 98.85%Cooling water inlet temperature ≤ 38 ° CCeiling voltage 2 timesRated field current 2510 ARated field voltage ( 90 ° C) 302 VCold H2 temperature Normal 46° C , Max 48° CStator winding demineralized water inlet temperature

45~ 50 ° C

3. ParameterNo load field current 987 ANo load field voltage (75 ° C) 113 VStator winding resistance (15 ° C) 0.00212 Ω/

PHRotor winding resistance (15 ° C) 0.0923 ΩRotor winding self- inductance 0.857 HStator winding capacitance to ground/ phase 0.209 μFDirect axis sub-transient reactance (unsaturated) X” du 17.4%Direct axis sub-transient reactance (saturated) X” d 16%Quadrature axis sub-transient reactance (unsaturated) X” qu 17.2%Quadrature axis sub-transient reactance (saturated) X” q 15.8 %Direct axis transient reactance (unsaturated) X’ du 22.9 %Direct axis transient reactance (saturated) X’ d 20.2 %Quadrature axis transient reactance (unsaturated) X’ qu 38.2 %

Quadrature axis transient reactance (saturated) X’ q 33.6 %Direct axis synchronous reactance Xd 180 %Quadrature axis synchronous reactance Xq 175 %Negative phase-sequence (unsaturated) X2u 17.3%Negative phase-sequence (saturated) X2 15.9 %Zero phase-sequence (unsaturated) X0u 7.93 %Zero phase-sequence (saturated) X0 7.53Direct axis transient open circuit time constant T’do 8.6 sQuadrature axis transient open circuit time constant T’ q0 0.956 sDirect axis transient short circuit time constant T’d 0.965 sQuadrature axis transient short circuit time constant T’q 0.184 sDirect axis sub-transient open circuit time constant T” d0 0.044 sQuadrature axis sub- transient open circuit time constant T’q0 0.074 sDirect axis sub-transient short circuit time constant T” d 0.035 sQuadrature axis sub- transient short circuit time constant T’q 0.035 s

4. The operation performance of H2 cooler

Generator continuous operation capacity at rated H2 pressure, with 1/8 set of 4 coolers out of service

318 MVA / 270 MW

Generator continuous operation capacity at rated H2 pressure, with 1/8 set of 4 coolers out of service, but not at the same corner

282 MVA / 240 MW

Generator continuous operation capacity at rated H2 pressure, with 1/8 set of 4 coolers out of service, but at the same corner

212 MVA / 180 MW

Generator is not recommended to be operated in the air, because the frication and windage loss will go highVolume of cooling water required 4 x 110 m³/hWater pressure drop inside the cooler 56 KPa

5. Generator weight and critical speed

Weight of the stator (including end bracket, coolers, bed plate and lead box)

262 t

Max. transportation weight (stator, including transportation cover, but not including end bracket, coolers, bed plate and lead box)

210 t

Generator rotor weight 53 tBrushless exciter weight 24.5 tSudden short circuit torque 1400 t-mGenerator rotor moment of inertia J= 8180 Kg-m²Equivalent to rotor flywheel moment GD²= 32.7 t-m²Generator rotor critical speed 1st 867 RPM

2nd 2256 RPM

.1 GENERATOR AND EXCITATION SYSTEM

3.1.1 GENERATOR MAKE BHELTYPE THRI - 930-38 PCODE IS 5422, IEC-34.1ACTIVE POWER 130 MWAPPARENT POWER 162.5 MVASTATOR VOLTAGE (U) 10,500 + / - 5% Volts AT 47.5 HzSTATOR CURRENT (I) 8,935 AmpsPOWER FACTOR (Pf) 0.8 LagFREQUENCY (f) 50 HzRATED SPEED (N) 3000 rpmGUARANTEED EFFICIENCY AT MCR 98.78 %SHORT CIRCUIT RATIO 0.57NEGATIVE PHASE SEQUENCE CURRENT CAPABILITY

I2t not more than 10 sec

STATOR PHASE CONNECTION DOUBLE STARDIRECTION OF ROTATION CW (Viewed from slip ring end)HYDROGEN PRESSURE 3.0 kgf/cm2

TERMINAL MARKING VEIWED FROM SLIP RING END. (L TO R)

PHASE : U V WNEUTRAL: X Y Z

STATOR WINDING RESISTANCE AT 200CPHASE U – XPHASE V – YPHASE W –Z

0.000794677 ohms0.000809157 ohms0.000800924 ohms

ROTOR WINDING RESISTANCEAT 200C 0.08801328 ohmsNO OF SLOTS 48WINDING TYPE LAP

MACHINE REACTANCE VALUESDIRECT AXIS TRANSIENT REACTANCE1. SATURATED ( X’d)2. UNSATURATED (X’du)

0.2064 P.U0.2282 P.U

DIRECT AXIS SUB TRANSIENT REACTANCE.1. SATURATED ( X’‘d)2. UNSATURATED (X’’du)

0.1512 P.U0.1867 P.U

DIRECT AXIS SYNCHRONOUS REACTANCE1. SATURATED (Xd)2. UNSATURATED (Xdu)

1.672 P.U1.8971 P.U

QUADRATURE AXIS SYNCHRONOUS REACTANCE 1.8023 P.UNEGATIVE SEQUENCE REACTANCE (X2) SATURATED 0.146 P.UZERO SEQUENCE REACTANCE (X0) 0.125 P.UMACHINE TIME CONSTANTS1. DIRECT AXIS, TRANSIENT OPEN Ckt. (T’ do)2. DIRECT AXIS, TRANSIENT CLOSED Ckt. (T’ d)3. SUB TRANSIENT ( T”d)

6.691 Sec0.767 Sec0.030 Sec

FIELD TEST VOLTAGE 2500 Volts rmsCLASS OF INSULATION FWEIGHT OF STATOR 127 TONSWEIGHT OF COOLERS & SHIELDS 5 + 13 = 18 TONSWEIGHT OF ROTOR 28 TONSSTATOR CORE OUTER DIA 3780mmSTATOR CORE LENTH 6390 mmAIR GAP 62.5 mm

3.1.2 EFFICIENCY OF TURBO GENERATOR PARAMETER 100% Load

(130MW)80% Load (104MW)

60% Load (78MW)

FIELD CURRENT 2056 Amps 1812 Amps 1573 AmpsFRICTION LOSSES 341.3 Kw 341.3 Kw 341.3 KwCORE LOSSES 235 Kw 235 Kw 235 KwSTATOR Cu. LOSSES 575 Kw 370 Kw 205 KwFIELD LOSSES 480 Kw 379 Kw 291.1 KwTOTAL LOSSES 1631 Kw 1325.3 Kw 1072.4 KwEFFICIENCY 98.76 % 98.74 % 98.64 %

3.1.3 STATIC EXCITATION SYSTEM MAKE BHELTYPE STATIC EXCITATION SYSTEMACCURACY OF EXCITATION CONTROL +/- 0.5%RANGE OF VOLTAGE CONTROL IN AUTO 90%UGN TO 110%UGNRANGE OF VOLTAGE CONTROL IN MANUAL 75% IFO to 110% IFN RANGE REACTIVE CURRENT COMPENSATION 0 TO 15%FREQUENCY RANGE OF OPERATION 47 Hz TO 52 HzTOTAL NO. OF PARALLEL THY. BRIDGES 4NO.NO. OF REDUNDANT THYRISTOR BRIDGES 2NO.PROTECTION CLASS IP31 FOR REG & FF

IP20 FOR OTHER CUBICLESEXCITATION EQUIPMENT RATING NO LOAD FIELD VOLTAGE (Ufo)NO LOAD FIELD CURRENT (Ifo)NOMINAL FIELD VOLTAGE (Ufn)NOMINAL FIELD CURRENT (Ifn)

77.8VDC763.1ADC239.9VDC2039.3ADC

MAX. CONT. RATED FIELD VOLTAGE (Ufmax)MAX. CONT. RATED FIELD CURRENT (Ifmax)CEILING VOLTAGE (Ud)CEILING CURRENT (Id)DURATION OF FIELD FORCING

239.9VDC2039.3ADC479.8VDC3262.9ADC2SEC

STATION BATTERY SUPPLY 220 VDC

3.1.3 a). RECTIFIER TRANSFORMER:MAKE BHELTYPE CAST COIL RESIN DRY TYPEKVA RATING 1500 KVA

TAP NO HIGH VOLTAGE LOW VOLTAGE1 11075 Volts 400 Volts2 10763 Volts 400 Volts3 10500 Volts 400 Volts4 10238 Volts 400 Volts5 9975 Volts 400 Volts

PHASE 3-PHASETYPE OF COOLING AIR NATURALPERCENTAGE IMPEDENCE 6%FREQUENCY 50 HzVECTOR GROUP Dyn 5MODE OF CONNECTION BETWEEN L.V TERMINALS & THYRISTOR CONVERTER

CABLES

INSULATION LEVEL 75 KVp / 26 KVrmsDESIGN AMBIENT TEMP. 500CTEMP. RISE ABOVE AMBIENT TEMP. 900CWEIGHT OF TRANSFORMER 5000 kg

3.1.3 b) RECTIFIER ASSEMBLY:TYPE BHt 65MAKE BHELRATED RECTIFIED VOLTAGE 239.9 VoltsRATED RECTIFIED CURRENT 2309.3 Amps CEILING VOLTAGE RATING 479.8 Volts DCCEILING CURRENT RATING 3262.9 Amps DCCEILING DUTY DURATION 10 SecSCR BASE TEMP. AT RATED OUT PUT 1250CRATED PEAK INVERSE VOLTAGE OF SCR 1.95 VoltsMAX. VOLTAGE DROP ACROSS RECTIFIER *TYPE OF CONNECTION 3-PHASE BRIDGE OVER VOLTAGE WITH STAND CAPACITY ON DC SIDE *% SPARE CAPACITY OF RECTIFIERS ON THE BASIS OF GENERATED FULL LOAD EXCITATION

100%

FIELD SUPPRESSION ARRANGEMENT PROVIDED YESTOTAL LOSS IN EXCITATION SYSTEM AT RATED POWER

20 Kw

3.1.3 c) AUTOMATIC VOLTAGE REGULATOR:Temp. RANGE OF OPERATION *ACCURACY *DEAD BAND *RESPONSE TIME *AVR C.T RATIO 10,000 / 5 AmpsAVR P.T RATIO 10,500 / 110 VoltsAMBIENT TEMP. 50 0CALTITUDE 1000 M

3.1.4 NEUTRAL GROUNDING SYSTEM3.1.4 a) NEUTRAL GROUNDING TRANSFORMER

KVA RATING 35 KVAVOLTAGE RATING 10.5 KV / 240 VPHASE 1COOLING ANRATED DUTY CONTINUOUSTAPS OFF CKT, + / - 5% IN STEPS OF 2.5%

ON HV SIDE

3.1.4 b) NEUTRAL GROUNDING RESISTORRESISTANCE 0.61 OHMRATED CURRENT 240 AMPRATED DUTY 1 HOUR

3.1.5 SEAL OIL SYSTEMSEAL OIL SOURCE TURBINE OILSEAL OIL PUMP-ACKIND OF PUMP SCREW PUMPTYPE SNH 210-R46 (ALLWEILER)SPEED 16S-1

CAPACITY 2.16 DM3 /SDISCHARGE PRESSURE 12BARPUMP MOTOR RATING 4.85KWVOLTAGE /FREQUENCY 415V/50HZ

CURRENT 10.6ASPEED 16S-1

TYPE OF ENCLOSER IP54NO OF PUMPS 2 NOFULL CAPACITYSEAL OIL PUMP-DCKIND OF PUMP SCREW PUMPTYPE SNH 210-R46 (ALLWEILER)SPEED 16 S-1

CAPACITY 2.16 dm3 /SDISCHARGE PRESSURE 12BARPUMP MOTOR MAKE CROMPTON GREAVESRATING 5.6KWVOLTAGE /FREQUENCY 220V DCCURRENT 27ASPEED 16S-1

TYPE OF ENCLOSER IP54NO. 1 No FULL CAPACITYSEAL OIL LEVEL DETECTORSMAKE& TYPE NIVOLARM-CONTROLLER SERIES 500

CAPACITANCE TYPEPLACES OF LEVEL DETECTION GENERATOR BRG TE PRECHAMBERS

GENERATOR BRG EE PRECHAMBERSEAL OIL TANKSEAL OIL STORAGE TANKINTERMEDIATE OIL TANK

3.1.5 SEAL OIL SYSTEM (CONTD.)

VACUUM PUMP

MODEL TRIVAC, SABTYPE 1-STAGE, OILSEALED ROTARY SLIDING

VANE PUMPRATED SUCTION CAPACITY 4.8 m3 / h WORKING CYCLES/ROTATION 3 TOTAL PARTIAL VACUUM < 10 –2 TorrTOTAL ULTIMATE VACUUM WITH GASBALLAST

< 6X10–1 Torr

OIL FILLING 0.8 – 1.2 dm3

VACUUM PUMP MOTORTYPE AM80KY4 (AEG)RATING 0.55 KWVOLTAGE 415 VFREQUENCY 50 HZCURRENT 0.5 ASPEED 25 S –1

TYPE OF ENCLOSURE IP54NO OF PUMPS 1, FULL CAPACITYBRG VAPOUR EXTRACTORNO OF BRG VAP EXTS 2 (1-OP, 1-S /B)RATING 0.75 KWVOLTAGE 415 VCURRENT 1.65 ASPEED 49 HzType of exhausters Radial flowVolumetric flow rate 380 m3/h AT 10 mbarSEAL OIL COOLERNO & CAP OF COOLERS 2, 100 % EACHOIL FLOW 2.17 dm3 / SHEAT DISSIPATING CAP 90 KWOIL INLET TEMP 68 COIL OUTLET TEMP 43 C OIL PR DROP ( APPROX ) 0.9 BARCOOLING WATER FLOW 5.4 M3 / HR WATER INLET TEMP 36 C ( MAX ) WATER OUTLET TEMP 40 C WATER PR DROP 0.6 BARSEAL OIL FILTER UNITKIND SCREEN FILTERVOL FLOW RATE 2.16 dm3 / SDEG OF FILTRATION 100 MICRONSDP ACROSS FILTER 0.2 BAR (CLEAN)

1.2 BAR (100% FOULING)NO OF FILTERS 2, EACH FULL CAPACITY

3.1.5. SEAL OIL SYSTEM (CONTD.)

LUBRICATION CHART

SEAL OIL PUMP-AC TURBINE OILSEAL OIL PUMP-DC TURBINE OILVACUUM PUMP SPECIAL OIL N62BRG VAPOUR EXT LITHIUM SOAP GREASE

KP3N TO DIN 51825SEAL OIL PUMP-AC MOTOR GREASE KP2N TO DIN 51825SEAL OIL PUMP-DC MOTOR GREASE KP2N TO DIN 51825VACUUM PUMP MOTOR GREASE KP2N TO DIN 51825GAS DRIER MOTOR GREASE KP2N TO DIN 51825BRG VAP EXT MOTOR GREASE KP2N TO DIN 51825

3.1.6 H2 SYSTEMH2 COOLED AREAS OF GEN GEN STATOR WINDING

GEN STATOR COREGEN ROTOR

POSSIBLE LOAD WITH ONE COOLER SECTION OUT

66 % OF GENERATOR OUTPUT

LOCATION OF H2 BOTTLES 0 M TG BLDGBOTTLED H2 GASEOUSPRESSURE 10 – 200 BAR (g)VOLUMETRIC FLOW RATE 40 – 60 DM3/S AT STP OR 144 – 216 m3/hGENERATOR GAS VOLUME 51 m3BOTTLE MATERIAL STEELON SITE STORAGE CAP 3O DAY OPN &

FILL GR TO 99%PURITY (MIN)GENERATOR H2 PRESSURE 3 BAR (g)GENERATOR H2 PURITY MIN 98 % GENERATOR H2 PURITY LIMIT 90 %GENERATOR H2 LOSS – MAX 12 M3 / 24 HRS AT STPDP BETWEEN SEAL OIL & H2 1.5 BAR

H2 PRESSURE MEASUREMENT

AT H2 BOTTLEAT H2 CASING

AT H2 PRESSURE REDUCERSAT H2 GAS DRIER CHAMBER

H2 PURITY MEASUREMENT1 ELECTRICAL TYPE AT FILLING & RATED SPEED2 MECHANICAL TYPE AT RATED SPEED ONLY3 SAMPLING TYPE AS PER NEED

DEHYDRATING FILTER

LOCATION ELECT PURITY MEASURE SYSMOISTURE ABSORBENT SILICA GEL / BLUE GELREACTIVATION TEMP 120 °C

3.1.6 HYDROGEN SYSTEM (CONTD)

HYDROGEN COOLER

TYPE OF HEAT EXCHANGER TUBE-WATER&SHELL-H2 CROSS FLOW TYPE

NO OF COOLERS 2NO OF ELEMENTS 2 / COOLERNO OF PASSES 2 FOR WATER SIDEHYDROGEN PRESSURE 3 BARGAS FLOW THRU EACH ELEMENT 9 M3 / SHEAT DISSIPATING CAP 818.5 KW / COOLERCOLD GAS TEMP 42 C HOT GAS TEMP 62.3 CGAS PRESSURE DROP 26 mm WCCOOLING WATER FLOW 95 M3 / HR / ELEMENTWATER INLET TEMP 36 C – MAXWATER OUTLET TEMP 43.5 CWATER PRESSURE DROP 4 mm WC

H2 DRIER

TYPE 8.70 (BOLL+KIRCH)MOTOR 2BH 4100-OAC22-Z (SIEMENS)RATING 1.1 KWVOLTAGE / CURRENT 415 V / 2.5 ASPEED 48.5 HzTYPE OF ENCLOSURE IP 54VOLUME OF ABSORBENT MATERIAL 20 dm3

HEATER RATING 2.5 KWREGENERATION AIR FLOW RATE 70 m3/h @120mbarREACTIVATION SOURCE HOT AIRH2 REQUIREMENT (IF GEN AT REST) REPLACEMENT OF CO2 2.5 x GEN VOLAT START UP-PRESSURISING OP.PR(BAR) X GEN VOLOPERATION-LOSSES 0.5 M3/HR AT STPOPERATION-PURITY MEASURE 20 DM3/HR AT STPRECOMMENDED STOCK 2 x STARTING FILLING AND

PRESSURISING VOLUMEH2 BOTTLE VOLUMESH2 BOTTLE 40 150 BAR 6 M3 AT STPH2 BOTTLE 50 200 BAR 10 M3 AT STP

3.1.7 CO2 SYSTEMLOCATION OF CO2 BOTTLES 0 M TG BLDGSERVICE PURGING OUT AIR / H2BOTTLED CO2 LIQUIDPRESSURE 1 – 2.5 BARTEMPERATURE 20 – 30 CVOLUMETRIC FLOW RATE 40–60 DM3/S AT STP OR 144–216 m3/hBOTTLE MATERIAL STEELCO2 PURITY 99.7 %

CO2 FLASH EVAPORATOR

MODE OF HEATING ELECTRICALRATING 18 KW (6 x 3 KW)VOLTAGE 240 VHEAT TRANSFER LIQUID MARLOTHERMVOLUME OF HEAT TRANSFER LIQUID

25 dm

RELIEF VALVE ON HI PR. SIDE 80 BARRELIEF VALVE ON LO PR. SIDE 8 BARCO2 HEATER TUBE MATERIAL COPPERCO2 PR AFTER EXP VESSEL 7 – 25 PSI (g)

CO2 REQUIREMENT

START UP 2 X GEN VOLSHUT DOWN 2 X GEN VOLRECOM STOCK-START UP 6 X GEN VOLRECOM STOCK-OPERATION 4 X GEN VOLCO2 BOTTLE VOLUMES

CO2 BOTTLE 40 15 M3 AT STPCO2 BOTTLE 45 17 M3 AT STP

CO2 BOTTLE 66.7 25.2 M3 AT STPCOMPRESSED AIR SYSTEMSERVICE PURGE OUT CO2 FROM GENSOURCE STATION AIR SYSTEMPRESSURE 6 – 9 BARVOLUMETRIC FLOW RATE 40 – 60 dm3/S AT STP OR 144 – 216 m3/hOIL/HYDROCARBON PRESENT MAX 1ppm V/V OR W/WPARTICLE SIZE MAX 5 micronsDEW POINT AT LINE PR MAX 10 CDEHYDRATING FILTERLOCATION ELECT PURITY MEASURE SYSMOISTURE ABSORBENT SILICA GEL / BLUE GELREACTIVATION TEMP 120 CAIR REQUIREMENTSHUT DOWN 3 X GEN VOLCOMPRESSED AIR FILTERTYPE AHVOLUME OF ACTIVATED CARBON 13 dm3

SERVICE HOURS 1500 – 2000 HOURS (APPROX)THROUGHPUT 80 m3/h AT 8 BAR

3.2 H.T.TRANSFORMER 3.2.1 STATION TRANSFORMER

MAKE BHEL JHANSIREFERENCE STANDARDS IS : 2026YEAR OF MANU’R 1997SERVICE CONTINUOUSINSTALLATION OUTDOORWINDINGS 3UNIT 3 PHASE UNITNO LOAD VOLTAGE H.V/L.V1/LV2 220/6.9/6.9 KVLINE CURRENT HV/LV/SV 66.69 / 435.69 / 2094.33 ATYPE OF COOLING OFAF /ONAF /ONANRATED POWER AT VARIOUS COOLING METHODS (OFAF/ONAF / ONAN)FOR HV/ LV1 / LV2 50/25/25 MVA

8.33 / 6.25 MVA FREQUENCY /PHASE 50HZ/3PHASECONNECTION TYPE H.V. /L.V1./L.V2. STAR / STAR/ STAR VECTOR GROUP REFERENCE YNyn0 yn0IMPEDANCE VOLT. AT RATED CURRENT FOR PRINCIPAL TAPPING AT 75°C

a) HV – LVb) LV – SVc) HV – SV

13 % + IS TOLERANCE7.5% APPROX.21 % APPROX.

TYPE OF TAP CHANGER ON LOAD ON HV WINDINGRANGE OF TAPPING + 5% TO – 15 % IN STEPS OF 1.25%IMPULSE VOLTAGE WITHSTAND LEVEL

a) HV WINDINGb) LV WINDINGc) SV WINDING

950 KVp60 KVp75 KVp

POWER FREQUENCY WITHSTAND VOLTAGE FOR ONE MINUTE (SEPARATE SOURCE / INDUCED OVER VOLTAGE)


50 KV / 395 KV20 KV / 2 * NORMAL VOLTS28 KV / 2 * NORMAL VOLTS

NO LOAD LOSSES AT RATED FREQUENCY AND

100% RATED VOLTAGE 110% RATED VOLTAGE

23.5 KW (FIRM)35 KW APPROX.

LOAD LOSSES AT NORMAL RATIO, RATED CURRENT AND 75°C

102 KW (FIRM) (EXCLUDING COOLER LOSSES OF 2.5 KW)

TEMP. RISE OIL / WINDING 50°C / 55°CEFFICIENCY AT 75°C AND U.P.F FOR

a) 110% FULL LOADb) 75% FULL LOADc) 50% FULL LOAD

99.501 % (APPROX.)99.571 % (APPROX.)99.610 % (APPROX.)

VOLTAGE REGULATION AT FULL LOAD AT 75°C AND AT

a) UNITY POWER FACTORb) 0.8 POWER FACTOR (LAGGING)

1.253 % (APPROX.)8.642 % (APPROX.)

EXTERNAL SHORT CIRCUIT WITHSTAND CAPACITY

20,000 MVA FOR HV500 MVA FOR LV & SV

3.2.1 STATION TRANSFORMER (CONTD)TERMINALS OF TERTIARY WINDING BROUGHT OUT TO BUSHING

YES

TYPE OF MAGNETIC CIRCUIT CORETPYE OF CORE JOINTS FULLY MITREDTYPE OF WINDING


PARTIAL INTERLEAVED DISCHELICALHELICAL

TYPE OF INSULATIONa) HV WINDINGb) LV WINDINGc) SV WINDINGd) CORE TO ADJACENT WINDINGe) BETWEEN WINDINGS

PAPER+Press board+OILPAPER+Press board+OILPAPER+Press board+OILPress board cylinder+OILPress board cylinder+OIL

HV TERMINAL ARRANGEMENTa) CT DETAILSb) CLEARANCE BETW PHASES IN AIRc) CLEARANCE TO EARTH IN AIR

BUSHING WITH CTs2000 mm (MIN.)1820 mm (MIN.)

LV TERMINAL ARRANGEMENTa) CLEARANCE BTW PHASES IN AIRb) CLEARANCE TO EARTH IN AIR

WITHOUT CT280 mm (MIN)140 mm (MIN)

SV TERMINAL ARRANGEMENTa) CLEARANCE BTW PHASES IN AIRb) CLEARANCE TO EARTH IN AIR

WITHOUT CT280 mm (MIN)140 mm (MIN)

NEUTRAL TERMINAL ARRANGEMENTa) BUSHING CTb) NCT DETAILS

HV NEUTRAL WITH CTLV NEUTRAL WITHOUT CT

HV BUSHINGSa) RATED VOLTAGE CLASS / CURRENTb) 1.2 / 50 S. IMPULSE WITHSTANDc) 1 MIN POWER FREQUENCY

WITHSTAND (DRY & WET) VOLTAGEd) MIN. CREEPAGE DISTANCE

245 KV / 800 A (MAX)1050 KVp

460 KV7600 mm (MIN)

LV BUSHINGSa) RATED VOLTAGE CLASS / CURRENTb) 1.2 / 50 S. IMPULSE WITHSTANDc) 1 MIN POWER FREQUENCY


17.5 KV / 3150 A95 KVp

38 KV RMS280 mm (MIN)

NEUTRAL BUSHINGSa) RATED VOLTAGE CLASS / CURRENTb) 1.2 / 50 S. IMPULSE WITHSTANDc) 1 MIN POWER FREQUENCY


36 KV / 630 A170 KVp

70 KV375 mm

3.2.1 STATION TRANSFORMER (CONTD)HV NEUTRAL BUSHINGS

a) RATED VOLTAGE CLASS / CURRENTb) 1.2 / 50 µs. IMPULSE WITHSTANDc) 1 MIN POWER FREQUENCY


36 KV / 630 A170 KVp

70 KV750 mm

MAXIMUM FLUX DENSITY (EXCEPT IN YOKE BOLT PORTION)

a) RATED VOLTAGEb) 110% OF RATED VOLTAGE

1.70 Wb / M.Sq.1.87 Wb / M.Sq.

MAXIMUM CURRENT DENSITY a) HVb) LVc) SV

2.3 A / mm.Sq.2.0 A / mm.Sq.3.5 A / mm.Sq.

MAGNETISING CURRENT AT RATED VOLTAGE & FREQ (% OF F.L CURRENT)

<0.5 %

TANK COVER BELL SHAPEDWHEELS FLANGED /BI-DIRECTIONALPRESSURE WITHSTAND

a) TANKb) RADIATORS & OTHER FITTINGS

0.35 + NORMAL HEAD (KSC)0.35 + NORMAL HEAD (KSC)

VACUUM WITHSTANDa) TANKb) RADIATORS & OTHER FITTINGS

760 mmHg760 mmHg

COOLING FANSa) TYPE / RATINGb) QUANTITY

IMPELLER TYPE / 0.55 KW PER FAN4 RUNNING + 1 STANDBY

On load tap changerMake BHELType M-III 350-60/C-10193WRated voltage 60 KV SUITABLE FOR NEUTRAL

END OF 220 KVRated current 77.28 A rated, 350 A max. Number of steps 16Step voltage 1.590 KVRated voltage of drive motor 415 v, 3 ph , 50 HzRated voltage of control circuit 110 v ,1 ph, 50hzTime to complete one tap changing operation 5 sec for electrical operation.APPROXIMATE WEIGHT OF

a) COREb) WINDINGc) TANK, FITTINGS & COOLERSd) OILe) TOTAL WEIGHT (WITHOUT OIL)f) UNTANKING WT (CORE & WINDING)g) SHIP WTOF HEAVIEST PACKAGE

16,800 KG12,000 KG8,500 KG23,500 KG57,500 KG32,000 KG49,000 KG

3.2.1 STATION TRANSFORMER(CONTD)TOTAL QTY OF INSULATING OIL

a) OIL IN TANK, TURRET, BUSHINGS, OLTC & CONSERVATOR UP TO 30°C

b) OIL IN CONSERVATOR BTWN HIGHEST & LOWEST VISIBLE LVL

c) OIL IN COOLING EQUIPMENT

26,000 LITRES21,000 LITRES

1300 LITRES

3700 LITRESTANK DIMENSIONS

a) LENGTHb) BREADTHc) HEIGHT

5800 mm2300 mm3200 mm

DEGREE OF PROTECTION OF M. BOX IP 55DETAILS OF TANK & OTHER MATERIAL

a) THICKNESS OF TANK SIDE PLATESb) THICKNESS OF TANK BOTTOM PLATEc) THICKNESS OF TANK COVER PLATEd) THICKNESS OF RADIATOR SHEETe) THICKNESS OF CORE SHEET STEELf) MIN. CLEARANCE HT. FOR LIFTING

CORE & WDG FROM TANKg) MIN. CLEARANCE HT. FOR LIFTING HV

BUSHING FROM TANK COVER

8 mm16 mm25 mm1.2 mm0.27 mm

7000 mm FROM GROUND LEVEL

4500 mm ABOVE TANK COVERNEUTRAL GROUNDING TRANSFORMERMAKE EASTERN ELECTRICKVA RATING 75 KVAVOLTAGE RATING 4000 / 400VRATED DUTY CONTINUOUSTYPE OUTDOOR OIL FILLEDNEUTRAL GROUNDING RESISTORRESISTANCE 1.95 OHMCURRENT 210 AMPRATED DUTY CONTINUOUSTAPS OFF CKT AT 25%, 50%, 75%

3.2.2 INSULATING OIL PROPERTIESREFERENCE STANDARDS IS: 335APPEARANCE CLEAR, TRANSPARENT & FREE

FROM SUSPENDED MATTER OR SEDIMENTS

DENSITY AT 29.5°C 0.89 gm / ccKINEMATIC VISCOCITY AT 27°C (MAX.) 27 CstINTERFACIAL TENSION AT 27°C (MIN) 0.04 N / mFLASH POINT (MIN.) 140°CPOUR POINT (MAX.) -6°CNEUTRALISATION VALUE (TOTAL ACIDITY) (MAX)

0.03 mg / KOH / g

CORROSIVE SULPHUR NON-CORROSIVEELECTRIC STRENGTH (BREAKDOWN VOLTAGE) (MIN)

60 kV (RMS)

DIELECTRIC DISSIPATION FACTOR (TAN DELTA) AT 90°C (MAX)

0.002

WATER CONTENT (MAX) 15 ppmSPECIFIC RESISTANCE (MIN)AT 90°CAT 27°C

35 * 1012 ohm-cm1500 * 1012 ohm-cm

OXIDATION STABILITYa) NEUTRALISATION VALUE (MAX)b) TOTAL SLUDGE AFTER

OXIDATION (MAX)

0.4 mg / KOH / g0.10% mg / KOH / g

AGEING CHARACTERISTICS AFTER ACCELERATED AGEING (OPEN BREAKER METHOD WITH COPPER CATALYST)A) RESISTIVITY (MIN) AT 90°C AT 27°C

0.2 * 1012 ohm-cm2.5 * 1012 ohm-cm

B) TAN DELTA AT 90°C (MAX) 0.2C) TOTAL ACIDITY (MAX) 0.05 mg / KOH / gD) SLUDGE CONTENT BY WEIGHT MAX) 0.05 %PRESENCE OF OXIDATION INHIBITOR NIL

3.2.3 UNIT AUXILIARY TRANSFORMERMAKE BHEL JHANSIREFERENCE STANDARDS IS : 2026YEAR OF MANUFACTURE 1996SERVICE CONTINUOUSINSTALLATION OUTDOORWINDINGS TWOUNIT 3 PHASE UNITNO LOAD VOLTAGE H.V/L.V 20/6.9 KVLINE CURRENT H.V. / L.V. 880.815/1340.370 AMPTYPE OF COOLING ONANRATING H.V 16 M.V.APHASE / FREQUENCY 3 PHASE / 50 HZ TYPE OF CONNECTION H.V./L.V. DELTA/STARVECTOR GROUP REFERENCE Dyn11IMPEDANCE VOLTAGE AT RATED CURRENT FOR PRINCIPAL TAPPING AT 75°C

7.5 % + IS TOLERANCE

TYPE OF TAP CHANGER OFF CIRCUIT ON HV WINDINGRANGE OF TAPPING +/- 5% IN STEPS OF 2.5%IMPULSE VOLTAGE WITHSTAND LEVEL

a) HV WINDINGb) LV WINDING

75 KVp60 KVp

POWER FREQUENCY WITHSTAND VOLTAGE FOR ONE MINUTE


28 KV20 KV

NO LOAD LOSSES AT RATED FREQ. AND 100% RATED VOLTAGE 110% RATED VOLTAGE

15.50 KW23.52 KW


68.0 KW

TEMP. RISE OIL / WINDING 50°C / 55°CEFFICIENCY AT 75°C AND U.P.F FOR

a) 110% FULL LOADb) 75% FULL LOADc) 50% FULL LOAD

99.4899.5599.60

VOLT. REGN. AT F.L AT 75°C AND ATa) UNITY POWER FACTORb) 0.8 POWER FACTOR (LAGGING)

0.705 %4.997 %

EXTERNAL SHORT CIRCUIT WITHSTAND CAPACITY

1000 MVA

TYPE OF MAGNETIC CIRCUIT CORETPYE OF CORE JOINTS FULLY MITREDTYPE OF WINDING


DISCHELICAL

TYPE OF INSULATIONa) HV WINDINGb) LV WINDINGc) CORE TO ADJACENT WINDINGd) BETWEEN WINDINGS

PAPER+Press board+OILPAPER+Press board+OILPress board cylinder+OILPress board cylinder+OIL

HV TERMINAL ARRANGEMENTa) CLEARANCE BETW PHASES IN AIRb) CLEARANCE TO EARTH IN AIR

BUSHING WITHOUT CTs280 mm140 mm

3.2.3 UNIT AUXILIARY TRANSFORMER(CONTD)LV TERMINAL ARRANGEMENT

a) CT DETAILS (RATIO, ACC. CL, VA, TYPE

b) CLEARANCE BTW PHASES IN AIRc) CLEARANCE TO EARTH IN AIR

WTI CT PROVIDED1340.37 / 2.7 – 2.5 – 2.3 – 2.1, 10VA, RING280 mm140 mm

NEUTRAL TERMINAL ARRANGEMENT BUSHING WITHOUT CTHV BUSHINGS

a) RATED VOLTAGE CLASS / CURRENTb) 1.2 / 50 µs. IMPULSE WITHSTANDc) 1 MIN POWER FREQUENCY


17.5 KV / 1000 A95 KVp

38 KV25 mm

LV BUSHINGSa) RATED VOLTAGE CLASS / CURRENTb) 1.2 / 50 µs. IMPULSE WITHSTANDc) 1 MIN POWER FREQUENCY


17.5 KV / 2000 A95 KVp

38 KV25 mm

NEUTRAL BUSHINGSa) RATED VOLTAGE CLASS / CURRENTb) 1.2 / 50 µs. IMPULSE WITHSTANDc) 1 MIN POWER FREQUENCY


17.5 KV / 1000 A95 KVp

38 KV25 mm

MAXIMUM FLUX DENSITYa) RATED VOLTAGEb) 110% OF RATED VOLTAGE

1.70 Wb / M.Sq.1.87 Wb / M.Sq.

MAXIMUM CURRENT DENSITYa) HVb) LV

2.5 A / mm.Sq.2.5 A / mm.Sq.

MAGNETISING CURRENT AT RATED VOLTAGE & FREQ (% OF F.L CURRENT)

<0.5 %

TANK COVER CONVENTIONALPRESSURE WITHSTAND *

a) TANKb) RADIATORS & OTHER FITTINGS

760 mmHg760 mmHg* TESTED FOR 735 mmHg AS PER CBIP SPEC., CL.NO. 17.3.2

APPROXIMATE WEIGHT OFa) CORE & WINDINGb) TANK, FITTINGS & COOLERSc) OILd) TOTAL WEIGHT (WITHOUT OIL)e) UNTANKING WT (CORE & WDG)

15,500 KG13,325 KG16,890 KG42,970 KG16,890 KG

TOTAL QTY OF INSULATING OIL 19,940 LITRESTRANS PORT WT 32932 K.G. TANK DIMENSIONS

a) LENGTHb) BREADTHc) HEIGHT

2800 mm1600 mm2490 mm

DEGREE OF PROTECTION OF M. BOX IP 55

3.2.3 UNIT AUXILIARY TRANSFORMER(CONTD)

DETAILS OF TANK & OTHER MATERIALa) THICKNESS OF TANK SIDE PLATESb) THICKNESS OF TANK BOTTOM

PLATEc) THICKNESS OF TANK COVER PLATEd) THICKNESS OF RADIATOR SHEETe) THICKNESS OF CORE SHEET STEELf) MIN. CLEARANCE HT. FOR LIFTING

CORE & WDG FROM TANKg) MIN. CLEARANCE HT. FOR LIFTING

HV BUSHING FROM TANK COVER

8 mm14 mm

16 mm

1.25 mm0.27 mm

6600 mm

5600 mmNEUTRAL GROUNDING TRANSFORMERMAKE EASTERN ELECTRICKVA RATING 40 KVAVOLTAGE RATING 4000 / 400VRATED DUTY CONTINUOUSTYPE OUTDOOR OIL FILLEDNEUTRAL GROUNDING RESISTORRESISTANCE 3.9 OHMCURRENT 105 AMPRATED DUTY CONTINUOUSTAPS OFF CKT AT 25%, 50%, 75%

3.2.4 a) GENERATOR TRANSFORMERDESCRIPTION PARTICULARSManufacturer BHEL JhansiREFERENCE STANDARDS IS : 2026 PT.I,II, III & IVYEAR OF MANUFACTURE 1996Service ContinuousInstallation Out DoorType Of Transformer GeneratorUNIT 3 PHASE UNITNo Of Winding Two No Of Phase ThreeRated No Load VoltageA)HV WindingB)LV Winding

230kv10.5kv

Type Of Cooling ONAN/ONAF/OFAFRated Power at various cooling methodA)ONAN B)ONAFC)OFAF

97.8 MVA130.4 MVA163.0 MVA

Rated Frequency 50 HzWinding ConnectionHV Winding LV Winding

StarDelta

VECTOR GROUP REFERENCE YNd1Impedance voltage at rated currentFor the principal tapping at 750cHV- LV 12.5% 10%Type of tap changer On loadOn which winding HV Total range of tapping +5% to – 15%Size of tapping step 1.25%OLTC detailsa)operationb)type of control c)Remote tap position indicator included

Automatic/parallelRemote/localYes 1) Digital for control desk2) 4 to 70mA out for CRT

IMPULSE VOLTAGE WITHSTAND LEVELa) HV WINDINGb) LV WINDING

950 KVp75 KVp

POWER FREQUENCY WITHSTAND VOLTAGE FOR ONE MINUTE


50,395 KV ABOVE EARTH28 KV

NO LOAD LOSSES AT RATED FREQUENCY AND 100% RATED VOLTAGE 110% RATED VOLTAGE

91.0 KW (FIRM)140 KW (APPROX)


475 KW (FIRM) EXCLUDING AUX. COOLER LOSS OF 21 KW APPROX.

Guaranteed max temp rise of a)Oil by thermometerb)winding by resistance forONAN/ONAF/OFAF

500c

550c

3.2.4 a) GENERATOR TRANSFORMER (CONTD.)EFFICIENCY AT 750c & unity power factor for a) 110% full loadb) 75% full load c) 50% full load

99.65%99.70%99.74%

Voltage regulation at full at 750c and ata) Unity power factor b) At 0.8 power factor (lagging)

1.01%8.17%

External short circuit with stand capacity 20000MVA as per IS: 2026 Pt. -IType of Magnetic Circuit CoreType of core joints Fully mitredType of winding a) HVb) LV

Partially interleavedHelical

Type of insulation a) HV winding b) LV winding c) Core top adjacent windingBetween winding

Paper + press bd + oilPaper + press bd + oilPress bd + oilPress bd + oil

HV terminal arrangementBushing with CT 245 kV, 800 ACT details (Ratio, Acc, C1, VA, type) 500/1 A, PS, Vk > 300 V, Ie = 15mA at

Vk/2Clearance between phases in air 2100 mmClearance to earth in air 1900LV terminal arrangement Isolated phase bus duct Bushing with CT Porcelain with CTClearance between phases in air 280 mmClearance to earth in air 140 mmNeutral terminal arrangementBushing with CT Porcelain with CTNCT details (Ratio, Acc, C1, VA, type) Core 1: 500/1 A, PS, VK > 300 V, Ie =

15mA at VkCore 2: 500/1,5P20, 20V

HV bushing Rated voltage class 245KV Rated current 800 A1.2/50 micro sec impulse withstand 1050 KVp1-minute P.F withstand (dry & wet) voltage 460 KV Min. creepage distance 7600 mmLV bushing Rated voltage class 24KV Rated current 10,000 A1.2/50 micro sec impulse withstand 125 KVp1-minute P.F withstand (dry & wet) voltage 50 KV Min. creepage distance 375 mm

3.2.4 a) GENERATOR TRANSFORMER (CONTD.)Neutral bushingRated voltage class 36KV Rated current 630 A1.2/50 micro sec impulse withstand 170 KVp1-minute P.F withstand (dry & wet) voltage 70 KV Min. creepage distance 750 mmAt rated voltage Maximum flux density 1.7 wb/m.sq.At 110% rated voltage Max. flux density 1.87 wb/m.sq.HV Max. current density 3.5 amp / mm.sq.HV tap Max. current density 3.8 amp / mm.sq.L V Max. current density 3.5 amp / mm.sq.Magnetising current at normal voltage & frequency(%of full load current)

< 0.5 %

Tank cover bell shapedDEGREE OF PROTECTION OF M. BOX IP 55Wheels Flanged, bi-directionalPressure withstand Tank 0.35+normal head KSCRadiators & other fittings 0.35+normal head KSC.Conservator without air cell 0.175 kg/cm.sq.Vacuum withstandTank 760 mm of Hg Radiators & other fittings 760 mm of Hg Cooling fansType ImpellerQuantity 3(6+1)= 21 total including 3 no. spareRating 1.2 Kw each Cooling oil pumpsQuantity 3(1+1)=6 no.Rating 2 KwOn load tap changerMake BHELType M-III 600-110/C-10139WRated voltage 110 KVRated current 482 A rated, 600 A max. Number of steps 16Step voltage 1.660 KVRated voltage of drive motor 415 v, 3 ph , 50 HzRated voltage of control circuit 110 v ,1 ph, 50hzTime to complete one tap changing operation 6 sec- for electrical operation.APPROXIMATE WEIGHT OF

a) CORE & WINDINGb) TANK, FITTINGS & COOLERSc) OILd) TOTAL WEIGHT (WITHOUT OIL)e) UNTANKING WT (CORE & WINDING)f) SHIP WT OF HEAVIEST PACKAGE

92,800 KG62,020 KG44,880 KG154,820 KG13,000 KG111,100 KG

Quantity of insulation oil 50,430 litresOil in tank turret ,bushings, OLTC and conservator upto 30 deg c.

37,605 litres

Oil in cooling equipment 12,825 litres

3.2.4 a) GENERATOR TRANSFORMER (CONTD.)Tank Dimensions Length 6300 mmBreadth 2610 mmHeight 3330 mmDETAILS OF TANK & OTHER MATERIAL

a) THICKNESS OF TANK SIDE PLATESb) THICKNESS OF TANK BOTTOM PLATEc) THICKNESS OF TANK COVER PLATEd) THICKNESS OF RADIATOR SHEETe) THICKNESS OF CORE SHEET STEELf) MIN. CLEARANCE HT. FOR LIFTING

CORE & WDG FROM TANKg) MIN. CLEARANCE HT. FOR LIFTING HV

BUSHING FROM TANK COVER

8 mm16 mm20 mm1.25 mm0.27 mm

9500 mm

10500 mm

3.2.4 b) GENERATOR TRANSFORMERDESCRIPTION PARTICULARSManufacturer CGLREFERENCE STANDARDS IS : 2026 PT.I,II, III & IVYEAR OF MANUFACTURE 2001Service ContinuousInstallation Out DoorType Of Transformer GeneratorUNIT 3 PHASE UNITNo Of Winding Two No Of Phase ThreeRated No Load VoltageA)HV WindingB)LV Winding

230kv10.5kv

Type Of Cooling ONAN/ONAF/OFAFCAPACITY 97.8/130.4/163 MVACURRENT HV/LV 407.1A /8962.6ACUARANTEED TEMP RISE OIL /WDG 50°C / 55°CBIL (KVp) HV/LV 950/75CONNECTION & SYMBOL STAR/DELTA – Ynd1NEUTRAL GROUNDING HV SOLIDLY EARTHEDTYPE OF CONSERVATOR COPS Air cell inside the conservatorTYPE OF TANK BELLTYPE OF TAP CHANGER ON LOAD,

MAKE: BHEL M III 500 Y 60-C 10.19.3W

LOCATION OF TAP CHANGER IN-TANKTYPE OF BUSHINGHVLVHV-N

245 KV / 800 A CONDENSER TYPE24 KV / 10 KA High Current Bushing36 KV / 630 A PORCELAIN TYPE

TOTAL OIL 50000 kgUNTANKING MASS – CORE COIL 85000 kgUNTANKING MASS – BELL 12000 kgTOTAL MASS 178000 kgTAP CHANGERMAKE BHELTYPE M III 600

3.3 SWITCHYARD PARAMETERS

3.3.1 GENERAL DETAILSOperating voltage Normal – 220 kv

Highest-- 245kvNormal – 400 kvHighest-- 420kv

Basic impulse 1050 peak 1425 peakRated current 1600 amps 2000 ampsAbort time current & duration 40ka for 1 sec. 40ka for 1 sec.Dynamic rating 100 ka peak 150 ka peak

Minimum clearance 1- phase to phase2- phase to earth 3- live point to ground 4- section clearance

2100 mm2100 mm5500 mm5000 mm

4100 mm3500 mm8000 mm6500 mm

ConductorShield wireInsulator String – 1. Type2. Total Creepage Distance 3 Electromechanical Strength4.Voltage Class5. Impulse withstand of string (KV)6. Number per string Withstand Voltage one min. power frequency (dry)one min. power frequency (wet)1.2/50 microsec. impulse (dry)1.2/50 microsec. impulse (wet)

Anti Fog type 31 mm/KV

105013 Suspension / 14 tension.

Anti Fog type 31 mm/KV

155023 Suspension / 25 tension.

Maximum design tension at 16 0 c for conductor -All bay buses in the switch yardCircuit conductors for GT & ST bays.Interconnection conductors to steel plant s/yShield wire Bus post insulator. – type Ultimate cantilever strengthTotal creep distanceVoltage classWithstand voltage . One min. power frequency (dry) One min. power frequency (wet)1.2/50 micro sec. Impulse(dry)1.2/50 micro sec. Impulse(wet)

31 mm/ KV 31 mm/ KV

3.3.2 ISOLATORApplication OUT DOOR S/Y 220 KV OUT DOOR S/Y 400 KV

Type of break Single break, centre break pantograph

Voltage 245 KV 420 KV

Frequency 50 Hz 50 Hz

Rated current for site conditions 1600 A 2000 A

Short time current 40 KA for 1 second 40 KA for 1 second

Rated peak short circuit current

Insulation level 1050 KVP 1425 KVP

Phase spacing

Operating device Manual and Motor driven Manual and Motor driven

Creepage distance 31 mm/ KV 31 mm/ KV

Minimum cantilever strength 600 Kg 800 Kg

Aux. Supply l 220v, D.C for control and interlock; 415v A.C, 3 phase for motor drive.

220v, D.C for control and interlock; 415v A.C, 3 phase for motor drive.

Interlocks with circuit breaker Bolt interlock and Electrical Interlock

Bolt interlock and Electrical Interlock

3.3.3 SF6 CIRCUIT BREAKER

Type SF6 outdoor 220 KV SF6 outdoor 400 KVMakeQUANTITYRated Voltage 245 KV 420 KVRated current 1600 A 2000 AShort circuit breaking current & duration 40KA for 1 sec. 40KA for 1 sec.Making current 100 kAp 100 kApOperating duty 0-0.3 Sec-CO-3 min –CO 0-0.3 Sec-CO-3 min –COFirst pole clear factorImpulse with stand voltageOne minute power frequency withstand voltageLine charging current breakingCable charging current breakingOver voltage factor while switching off above currentsType of operating mechanismOperating mechanism to be suitable forControl voltage 220V DC 220V DCPole Single Single No. of trip coils per polePhase to phase phasingInsulation level 1050 KVP 1425 KVPMinimum cantilever strength 600 Kg 800 KgCreepage distance 31 mm/ KV 31 mm/ KVTotal break time (Max) 60 milli secs 40 milli secsTotal make time (Max) 100 milli Secs. 150 milli Secs.SF6 Gas pressure nominalPneumatic air pr. trip BlockingPneumatic air pr. Blocking

Pneumatic air pressure low alarm

SF6 Gas pressure low alarmSF6 Gas pressure blockingPneumatic air pressure

3.3.4 CURRENT TRANSFORMERType Outdoor, Oil filled

hermetically sealed 220 KVOutdoor, Oil filled hermetically sealed 400 KV

MakeNominal voltage & frequency 220 KV & 50 Hz 400 KV & 50 HzHighest system voltage 245 KV 420 KVNo of coresGenerator transformer baySTN. Transformer bayShort time thermal rating 40 ka for 1 sec. 40 ka for 1 sec.Dynamic rating 100 KAp 100 KApClass of insulationImpulse with stand voltage KVP 1050 KVp 1425 KVpOne min. power frequency with standCreepage distance 31 mm/ KV 31 mm/ KVApplicable StandardsInsulating oil

3.3.5 CAPACITOR VOLTAGE TRANSFORMERApplication Out door Out doorNominal/highest voltage/frequency 220/245kv/50 Hz 400/420kv/50 HzCoefficient of EarthingRated pr. Voltage 220kv/√3 400kv/√3Rated sec. Voltage 110v / √3, 110v / √3 110v / √3, 110v / √3No. of sec. Wdg.Accuracy classRated voltage factor 1. 2 continuous & 1.5 for 30s. 1. 2 continuous & 1.5 for 30s.Class of wdg . insulation Oil immersed class A Oil immersed class ARated capacitance HF capacitancePr. CapacitanceSec. CapacitanceVoltage factorBurdenHigh frequency rangeMinimum cantilever strength 600 Kg 800 Kg1.2/50 micro sec impulse with stand voltage 1050 kv 1425kv1 min. power freq. With stand vol.Method of connection Star/Star/open Delta Star/Star/Star

3.3.6 LIGHTNING ARRESTERMAKE 220 KV 400 KVType Out door gapless Out door gaplessNominal 220 KV 400 KVRated arrester voltage/operating voltage 198kv 360 KVNominal discharge. Current of 8/20 micro sec. 10 kA 20 kAImpulse current withstandDuty cycle Class 3 Class 4High current short duration 4/10 micro waveResidual volts corresponding to steep current impulseLightning impulseSwitching impulseMin. symmetrical fault current 40 ka 40 ka

3.4 220KV MAIN STEP DOWN STATION

NUMBER OF BAYS 11 NOSKPTCL LINE BAYS 2 NOSJSWSL CPP-2 LINE BAY 1 NOBUS COUPLER BAY 1 NOBUS TRANSFER BAY 1 NOTRANSFORMER BAYS 6 NOS

3.4.1 SF6 CIRCUIT BREAKERMAKE ABBTYPE E L F SL 4-1QUANTITY 11 NOSRATED VOLTAGE 245 KVRATED CURRENT 2000 AFREQUENCY 50 HZLIGHTING IMPULSE WITHSTAND VOLTAGE 1050KVSHORT CIRCUIT BREAKING CURRENT 40 KAS.C WITHSTANDING CURRENT/DURATION 40KA/ 3 SECLINE CHARGING BREAKING CURRENT 125AOPERATING SEQUENCE O-0.3S-CO-3MIN-COFIRST POLE TO CLEAR FACTOR 1.3SF6 GAS PR AT 20 DEGREE C (ABS) 7 BARALARM / BLOCKING PR (SF6) 6.2 / 6.0 BARCLOSING & OPENING DEVICE SUPPLY VOLTAGE 220 VDCAUX CIRCUIT SUPPLY VOLTAGE 240 VACAIR PR 22 BARALARM PR FOR AIR 18 BARBLOCKING PR FOR CLOSE/TRIP/RECLOSE (AIR) 17.3/16.7/19 BARDE-BLOCKING PR. FOR CLOSE / TRIP / RECLOSE (AIR) 17.5/16.9/19.2 BARCOMPRESSOR START / STOP 19.5 / 20.5 BARCOMPRESSOR MAKE ELGIRECEIVER QUANTITY/ CAPACITY/BAY 2NOS/HEATER SUPPLY 240V, 1PHASE, 50 HZ

3.4.2 ISOLATORMAKE AMEI POWER LTDTYPE DOUBLE BREAKMECHANISM MOTOR OPERATEDRATED VOLTAGE 245 KVRATED CURRENT 2000ACONTROL SUPPLY 220V DCMOTOR VOLTAGE 415V AC, 3 PHASEMOTOR HP 0.5DEGREE OF PROTECTION IP 55

3.4.3 EARTH SWITCHMAKE ELPROTYPE HCBMECHANISM MANUALRATED VOLTAGE 245 KVBIL 1050 KVpWT 200 KG

3.4.4 LIGHTNING / SURGE ARRESTORMAKE WS INDUSTRIESDESIGNATION SMXRated arrester voltage/operating voltage 198kv/168 kvNOMINAL DISCHARGE CURRENT 10 KA (crest)LINE DISCHARGE CLASS 3MAX RESIDUAL VOLTAGE KV CREST AT 10KA 550REF CURRENT 3 mA (peak)REF VOLTAGE KV RMS/PK 218 KV (MIN)PARTIAL DISCHARGE AT COVX 1. 05 KV RMS 50 pC (MAX)SPECIFICATION REFERRED IEC 99-4SURGE MONITOR TYPE / MAKE 03/WS INDUSTRIES

3.4.5 CURRENT TRANSFORMERMAKE CROMPTON GREAVESTYPE IOSKRATED TRANSFORMATION RATIO 1600 – 800 –500 / 1 ARATED / HIGHEST SYSTEM VOLTAGE 220 / 245 KVS.C RATING 40 KA / 1SECNO. OF CORES 6 NOCORE DETAILSCORE NO 1 2 3 4 5 6BURDEN (VA) * * 75 * * 40ACC CLASS PS PS 0. 5 PS PS 0. 5ALF/ISF * * 10-5-5 * * 10-5-5KPV(VOLTS) 2000-1000-625 * 2000-1000-625 *LeXe@VK(ma) 15-30-50 * 15-30-50 *Rsec @75 C 8-4-2.5 * 8-4-2.5 *

3.4.6 CAPACITOR VOLTAGE TRANSFORMERMAKE CROMPTON GREAVESTYPE CVE 245 //1050 / 50RATED TRANSFORMATION RATIO (220000/ 3)/ (110/3)RATED / HIGHEST SYSTEM VOLTAGE 220 / 245 KV

1a – 1n 2a – 2n 3a – 3n 4a – 4nRATED OUTPUT 150 200 100 400ACC CLASS 3P 0. 5 3P 0.5THERMAL OP 750 VATOTAL SIM. BURDEN / CLASS 400 VA / 0.5FREQUENCY 50 HZEQU CAPACITANCE OF COUPLING CAPACITOR

8800 pF +10%, -5%

INSULATION LEVEL 220/460/1050 KVTOTAL WEIGHT 685 +/- 10% Kg

3.4.7 80 MVA TRANSFORMERSMAKE CROMPTON GREAVESQUANTITY 2 NOSMVA 50/63/80COOLING ONAN/ONAF/OFAFMVA HV/LV1/LV2 80/40/40

HV LV1 LV2RATED VOLTAGE KV 220 34.5 34.5RATED CURRENT A 209.90 669.40 669.40BIL (KVP) 950 170 170NO OF PHASES 3FREQUENCY 50VECTOR GROUP YNd11d11TAPPING Tap From 5% To -20% In Steps Of 1.25%On Hv TEMP RISE WINDING TEMP 50TEMP RISE OIL TEMP 40TOTAL OIL 33700 LTSNO LOAD LOSS 63620WLOAD LOSS 153190WAUX LOSS 7880WSHORT TIME RATING 5SECOLTC MAKE MR, GERMANYTYPE D111400Y60/60 12.23.3WSUPPLY VOLTAGE 415 V ,50 HZ , 1 PHASECONTROL VOLTAGE 110 V ACFOR 1 TAP CHANGE 33 REVCOOLING PUMP MAKE CGLTYPE IL 3ARPM 1425DUTY S1VOLTAGE 415,50 HZ , 1 PHASECLASS FHEDA 3HP/ KW 2 / 1. 5CURRENT 3.2

3.4.8 50 MVA TRANSFORMERSMake NGEFTYPE ONTR 50000/220ESTANDARD IS 2026TYPE OF COOLING ONANRATED MVA HV / LV 50/50RATED VOLTAGE AT NO LOAD HV/LV 220/11 KVRATED CURRENT HV/LV 131.2 / 2624.3 AVECTOR GROUP YNyn0d11PHASES 3MAX AMBIENT TEMP 50 °CTOP OIL TEMP RISE 40 °CWINDING TEMP RISE 50 °CSYMMETRICAL S.C CURRENT 7.87* InMAX SHORT CIRCUIT DURATION 5 SECINSULATION LEVEL HV LV HV NEU LV NEU STAB.WGKV 395 28 38 28 20KVP 950 75 95 75 60INSULATING OIL 31,820 LTS

RATIO ACC BURDEN VK RCT@75°C PROTECTIONHVN (2 CORE)

200/1 5P20 15 * * BACK UP E/F200/1 PS * >=300 * REF

LVN(2CORE)

3000/1 PS * >=600 <=2 REF400/1 5P15 * * <=2 BACK UP E/F

LV 1312/1 0.5 15 * * LDCOLTC NGEF

3.4.9a) 130 MVA TRANSFORMERSTANDARDS APPLICABLE IS 2026MAKE CROMPTON GREAVESYEAR OF MANUFACTURE 2003MVA HV/LV1/LV2 130 / 80 / 50COOLING OFAF/ONAF/ONANTYPE OF COOLING ONAN ONAF OFAFMVA – HV 82.5 102.375 130MVA – IV 50 63 80MVA – LV 31.25 39.375 50

HV IV LVRATED VOLTAGE KV 220 34.5 11.5RATED CURRENT A 341.162 1338.8 2510.3BIL (KVP) 950 170 95NO OF PHASES 3FREQUENCY 50VECTOR GROUP Ynd11yn0NO. OF TAPS 21TAPPING +10% To -15% In Steps Of 1.25%On HV TEMP RISE WINDING TEMP 50°CTEMP RISE OIL TEMP 40°CWT OF CORE & WDG 96800 kgWT OF BELL TANK 18400 kgTOTAL OIL 57300 kgTOTAL MASS 207000 kgNO LOAD CURRENT 1 % OF F.L.C (I.S TOL.)NO LOAD LOSS 68 KWLOAD LOSS AT PRINCIPAL TAP AND 75°C

380 KW AT TAP-9 (MAX)

% IMPEDANCE AT PRINCIPAL TAP AND 75°CHV-IVHV-LVIV-LV

15.46%30.15%47.11%

REGULATION AT U.P.F 0.388EFFICIENCY AT U.P.F 99.85RESISTANCE / PHASE @ 75°C (HV / IV/ LV) OHMS 0.49701 / 0.03229 / 0.00394FANS 10 NO.SRATING 700 WPUMPS 4 NO.SRATING 3.72 KWNOISE LEVEL 89 dBOLTC MAKE EASUNTYPE M III 600 – Y – 72.5 / C – 12.23.3WTRANSITION RESISTANCE 5.1 OHMSMOTOR 12.23 KW

3.4.9b) 130 MVA TRANSFORMERSTANDARDS APPLICABLE IS 2026MAKE ABBYEAR OF MANUFACTURE 2005MVA HV/LV1/LV2 130 / 102.2 / 81.25COOLING OFAF/ONAF/ONANTYPE OF COOLING ONAN ONAF OFAFMVA – HV 81.25 102.2 130MVA – LV1 40.625 51.367 65MVA – LV2 40.625 51.367 65RATED CURRENT HV 213.23 269.52 341.16RATED CURRENT LV1 & LV2 679.93 859.67 1087.76

HV LV1 LV2RATED VOLTAGE KV 240 34.5 34.5BIL (KVP) 950 170 170AC (P.F) (KVP) 395 70 70NO OF PHASES 3FREQUENCY 50VECTOR GROUP Ynd11d11NO. OF TAPS 21TAPPING +5% To -20% In Steps Of 1.25%On HV neutralTEMP RISE WINDING TEMP 50°CTEMP RISE OIL TEMP 40°CWT OF CORE & WDG 87000 kgWT OF TANK & FITTINGS 57500 kgWT / QTY OF OIL 50900 kg / 57200 LTSTOTAL MASS 195400 kgTRANSPORT WT (GAS FILLED) 108700 KGNO LOAD LOSS 68.5 KW at TAP-5LOAD LOSS AT NOMINAL TAP 305 KW AT TAP-5% IMPEDANCE AT PRINCIPAL TAP AND 75°CHV-LV1 & HV-LV2LV1-LV2HV-LV1+LV2

8%15%9.2%

RESISTANCE / PHASE @ 75°C (HV / LV1/ LV2) OHMS 0.4603 / 0.0455 / 0.0451FANS 16 NO.SRATING 410 W, 1400 RPM, 415 VPUMPS 4 NO.SRATING 1.1 KW, 800 RPM, 415 VNOISE LEVEL 69 dBOLTC MAKE EASUN-MRTYPE M III 600 – 123 / C – 10.23.3W

3.4.10 NGTNO OF PHASE 3MAKE NGEFTYPE 0NTU-PT 500/33STANDARD IS:2026/IS:3151FREQUENCY 50HzRATED NO LOAD VOLTAGE HV/ LV 33 KV / 433 VRATED CURRENT HV/ LV 8.75A/666.7 ARATED KVA 500POWER FREQ TEST VOLTS HV/ LV 70 KV / 3 KVRMSIMPULSE VOLTAGE 170 KVPTYPE OF COOLING ONANVECTOR GROUP ZN Yn11MAX AMB /TOP OIL /Wdg TEMP 45 /45 /55 oCIMPEDANCE VOLTAGE AT 500 KVA 33 KV /433 VbaseUNTANKING MASS 8.75 TTOTAL MASS 15.2 TTRANSPORT MASS 14.0 TVOLUME OF OIL 4045 LtsN C T HV LV

50 /1-1-1 A, 15 VA 3 core500 / 5 A ,800 /5 A ,15 VA 2 Core

ZERO SEQUENCE IMPEDANCE / PHASE 4.8 OHMSEARTH FAULT CURRENT 7000 A FOR 5 SEC IN NEUTRAL

3.4.11 ABT METERS

MAKE L & T WITH ABT FEATURESTYPE ER 300P-PRIDE ELECTRONIC

TRIVECTOR METERCLASS 0.2SAPPLICABLE STANDARDS IEC – 687SUPPLY VOLTAGE 3, 4WIRE/110V/1A/ 50 HZPF +1 TO –1REF TEMP 23 °CCT RATIO 600/1APT RATIO 220 kV /110 VPULSE RATE 50,000/UNITMF 1200000

3.5 SWITCH GEAR SYSTEM

3.5.1 SWITCH GEAR 6.6 KVNOMINAL VOLTAGE 6.6KVPHASE AND FREQUENCY 3PH, 50HZ

SYS NEUTRAL EARTHING NON EFFECTIVELY EARTHEDMAX. SYSTEM VOLTAGE 7.2 kVONE MINUTE POWER FREQUENCY WITH STAND VOLTAGE

27 kV rms

1.2 / 50 MICRO SEC IMPULSE WITHSTAND VOLTAGE

60 kV peak

MAX TEMPERATURE OF BUS BAR , DROPPERS, CONNECTORS & CONTACTS AT CONTINUOUS CURRENT RATING UNDER SITE REF. AMBIENT TEMPERATURE

85 °C

MATERIAL OF BUS BARS COPPERDEGREE OF PROTECTION BUS BAR -IPH 4

OTHERS – IPH 6MATERIAL OF EARTHING BUS GALV STEELCLEARANCE IN AIR OF LIVE PARTS PHASE TO PHASE – 127 mm

PHASE TO EARTH -77mmVACUUM BREAKER INDOOR METALCLADAPPLICABLE STANDARDS IS 13118 & IS 3427

IEC 298 , & IEC 56TYPE VM 12RATED VOLTAGE 7.2 k vRATED NORMAL CURRENT 630/1250/2500 ARATED FREQUENCY 50 HzRATED SHORT CIRCUIT BREAKING CURRENT 40 kA rmsRATED SHORT CIRCUIT MAKING CURRENT 100 kA peakRATED SHORT TIME WITH STAND CURRENT 40 kA rmsRATED DURATION OF S.C 1 TO 3 secRATED OPERATING TIME 60+/- 5 msRATED BREAK TIME 80 +/- 5 msRATED CLOSING TIME 75 +/- 5msRATED OPERATING SEQUENCE O - 0.3 sec – CO – 3min – CORATED IMPULSE WITH STAND VOLTAGE 75 kv peakRATED 1 MIN P.F WITHSTAND VOLTAGE 28/35 kv rmsAUXILIARY CONTROL SUPPLY FORA. CLOSE/ TRIP COIL/ SPRING CHARGEB. SPACE HEATER & LIGHTING

220 V DC240V, 1PH

TRIP FREE OPERATING MECHANISM TYPE MOTOR CHARGED SPRING MANUAL TRIP AND CLOSE FACILITY IS PROVIDED

3.5.1 SWITCH GEAR 6.6 KV(CONTD)INCOMER TO 6.6KV STATION SWGR RATING 2500AMPSBUS DUCT 2500 AMPS CT DETAILS RATIO 2500/1-1-1A

CORE-I O/P CLASS 10VA 5P20CORE-II O/P CLASS 20VA 1ISF<5CORE-III O/P CLASS VK>= <TORCT+180>V IE<= 30 mA AT

VK/2 PSAUX VOLTAGE DETAILS

RATIO 400/110VO/P 35VACLASS 0.5/3PAMMETER SCALE 0-2500AMPS

BUS PT 6.6KV STN SWGRVT DETAILS RATIO 6600 V / 110 V / 110 V

3 3 3SEC O/P ACCURAC 100 VA, 0.5/3P

50 VA, .3PAUX VT DETAILS RATIO 110 V / 110 V

O /P CLASS 10 VA, .5VOLT METER SCALE 0 – 8 KVFEEDER PTVT DETAILS RATIO 6600 V / 110 V / 110 V

3 3 3SEC O/P ACCURAC 100 VA, 0.5/3P

AUX VT DETAILS RATIO 110 V / 110 VO /P CLASS 10 VA, 0.5

VOLT METER SCALE 0 – 8 KVTIE TO UNIT BOARDRATING 1250ACT DETAILS RATIO 1200 / 1 – 1A

O/P CLASS

CORE I 10 VA , 5P20CORE II 20 VA , ISF < 5

AMMETER SCALE 0-1200AMOTOR FEEDER ( C.W PUMP 1350 Kw )RATING 630 ACT DETAILS RATIO 200/1-1A

CORE-I O/P CLASS 15VA 5P20CORE-II O/P CLASS 20VA 1ISF<5CORE-IIIO/P CLASS VK >= (25 + 15 RCT)

IE<= 30 ma AT VK/2 PSDIFF. CT DETAILS

RATIO 200/1AO/P CLASS VK >= (25 + 15 RCT)

IE<= 30 ma AT VK/2 PSAMMETER SCALE 0-200/1200A

3.5.1 SWITCH GEAR 6.6 KV(CONTD)UNIT INCOMER, TIE WITH STATIONRATING 1250AMPSCT DETAILS RATIO 1200/1-1A

CORE-I O/P CLASS 10VA 5P20CORE-II O/P CLASS 20VA 1 ISF<5

AUX VOLTAGE DETAILS

RATIO 400/110VO/P 35VACLASS 0.5/3PAMMETER SCALE 0-1200AMPS

DIFF CT DETAILS IF 1ACORE 1 RATIO 1200/1A , CALLS PS

VK >= 70RCT + 180 VIE <= 30 ma AT VK /2

CORE II RATIO 4000/1 A , CLASS PSVK >= 20 RCT + 215 VIE < = 30 ma AT VK/ 2

3.6 BATTERY, DCDB, UPS, & DG

3.6.1 BATTERY CHARGERSMAKE CONSTANT POWER MFG COQUANTITY 5+1 PORTABLE CHARGER

2 IN SWITCHYARD1 EACH IN STATION, UNIT # 1, UNIT # 2

MODEL USG-415-3ph –220 –200, 50HzINPUT 415VAC +/- 10 %, 3ph, 50Hz +/- 5%OUTPUT 220VDC, 200ADC(NOMINAL)REGULATION +/- 0.5 FROM 0 –100% LOAD WITH +/-

10% INPUT VOLTAGERIPPLE 1% (WITH BATTERY CONNECTED)CURRENT LIMIT 115% AT FULL VOLTAGE (SET AT 110%)POWER FACTOR >/= 0.75EFFICIENCY 85 - 92%SOFT START CURRENT WALK IN TO PROTECT

EQUIPMENT FROM HIGH INRUSH CURRENT

SCR RATING SILICON 800 P.I.VCOOLING CONVECTION COOLED(FAN ASSISTED)AMBIENT 0 – 50 OCFLOAT VOLTAGE SET AT FACTORY 243.0VEQUALIZE VOLTAGE SET AT FACTORY

256.3V

EQUALIZE TIMER/SWITCH 0 – 72 hrs (MANUAL INTIATE)LOW DC VOLTAGE ALARM FACTORY SET

198.0V

HIGH DC VOLTAGE SHUTDOWN FACTORY SET

269.5V

LOW DC CURRENT FACTORY SET 230A

3.6.2 TRANSFORMERSMAKE REXKVA 101.6PRIMARY SUPPLY 415V DELTA 50/60Hz 3ph ISOSECONDARY 266V DELTAIMPEDENCE 4% @ 350CINSULATION CLASS 220TEMPERATURE RISE 1100CTAPS 7

3.6.3 220 V DC DRY BATTERIES MAKE YUASA EXIDETYPE LEAD ACID BATTERIESLIFE 20 yrs AT 25°C UNDER FLOAT SERVICESPECIFIC GRAVITY 1.215FLOAT VOLTAGE 2.25VPCPOST TYPE 2 POSITIVE POSTS & 2 NEGETIVE POSTSVENT TYPE FLAME ARRESTOR FUSED ALUMINA NO. OF UNITS IN SERIES 55 (110 CELLS)UNIT#1& UNIT#2MODEL 2GC –21CAPACITY 1650 AHBattery charger 51 KW, 200 ACOMMONMODEL 2GC – 19CAPACITY 1535 AHBattery charger 24.3 KW, 150 ASWITCHYARDMODEL 2GC – 17CAPACITY 1410 AHBattery charger 24.3 KW, 300 A

3.6.4 DC SWITCHBOARDMAKE CLEVELAND SWITCHBOARD CO.NO. OF BOARDS 4SENSITIVE GND RELAYMAKE GECTYPE NGV29AINSTANTANEOUS VOLTAGE RELAYMAKE GECTYPE PJV11MCC CUTTLER – HAMMER FREEDOM 2100AIR BRK DE-ION CKT BKRMAKE WESTINGHOUSE

3.6.5 UPSMAKE CYBEREXRECTIFIER / CHARGER 415VAC, 3PH, 50HZ, 300A DCINVERTER 210 – 280VDC, 60KWLINE REGULATOR 415VAC, 1PH, 50HZ, 60KWBATTERY EXIDE DX-9SYSTEM AC OUTPUT 110VAC, 1PH, 50HZ, 60KWSYNC DISCONNECT + / - 1 HZ FROM 50HZSTATIC SWITCH TRANSFER + / - 10% OF NOMINAL VOLTAGE

3.6.6 DG SETNOs. 2MAKE SPECTRUM DETROIT DIESELTYPE 350DSRATING PRIME / STANDBY 287KW / 315KWP.F 0.8VOLTAGE 415VINSULATION CLASS HTEMP. RISE 80°C OVER 50°C AMBIENTPHASE 3FREQUENCY 50HZRPM 1500DIESEL ENGINEMODEL 8083-7405NO. OF CYLINDERS 8COMPRESSION RATIO 17:1RATING PRIME / STANDBY 454 / 500BHPFUEL CONSUMPTION 90LPHCOOLING SYSTEMTYPE UNIT MOUNTED RADIATORFAN TYPE BLOWERFAN AIR FLOW 14805CFMENGINE COOLANT 50% ETHYLENE GLYCOL & WATERSTARTING MOTOR VOLTAGE 24VDCBATTERY TYPE LEAD ACID

3.7 L.T TRANSFORMERS

3.7.1 L.T TRANSFORMER DESIGNATION & LOCATIONDesignation Rating Description Location

1 DAT 01

1500KVA (Dry Type)

Unit auxiliary Service Transformer

TG building, B-C bay 10.5m Ele.Unit #1 MCC Room1 DAT 02

2 DAT 01 TG building, B-C bay 10.5m Ele. Unit #2 MCC Room2 DAT 02

1 DBT 01

1500 KVA (Oil cooled)

E.P. Service Transformer

Eastern side of ESP electrical control room

1 DBT 02

2 DBT 01

2 DBT 02

0 DAT 01 2000 KVA (Dry Type) Station service

Transformer

Turbine building, B-C bay 0.0m Elev. Station switch gear room0 DAT 02

0 DBT 01 1500 KVA (Oil cooled)

Western side of ESP electrical control room0 DBT 02

0 DCT 01 2000 KVA (Oil cooled)

Cooling tower Service x fmr

CW Pump house switch gear room0 DCT 02

3.7.2 2000 KVA DRY TYPE TRAX'MERMake Dynapower CorporationType Ultracast dry type cast type cast coil trax'mer Enclosure NEMA standardizedRecommended surrounding Indoor ( 30oc Avg. with 40oc peak in a day)KVA rating 2000 kVAPrimary voltage 6600 voltsSecondary voltage 433 Y/ 250 voltsImpedance 7.416 %Temperature rise 70ocCooling class AANo. of phase 3Frequency 50 HzPolarity Dyn1Conductor Primary – Copper, Secondary – CopperInsulating medium Dupont Nomex in Epoxy ResinInsulation class FPrimary BIL 60 kVSecondary BIL 10 kVTap changer type Off loadAdditional tap voltages 2 @ 2.5% FCAN & 2 @ 2.5Wdg resistance at 23.9oc 0.09 Ω (HV) 0.505 Ω (LV) Weight (core & coil) 15000 LBSWeight (total) 18500 LBSNo load loss at 100% rated volts 3664 wattsExciting current 100% rated volts 0.316 %Losses at 23.9oc & rated current 13568 watts% Load & corr efficiency Load 100% 75% 50% 25%

(%) 99.15 99.25 99.30 99.1P.F & corresponding Regulation P.f. 1.0 lag 1.0 lag 1.0 lag 1.0 lag

Regl 0.68% 3.38% 4.97% 6.74%I2R losses 11998 WStray losses 3196 WFull load loss 15195 wTotal losses 18859 wNeutl. gr. resist. 350 ohmsMax fault current 1 amp

3.7.3 1500 KVA DRY TYPE Trax'merMake Dynapower CorporationType Ultracast dry type cast type cast coil trax'mer KVA rating 1500 kVAPrimary voltage 6600 voltsSecondary voltage 433 Y/ 230 voltsImpedance 5.809 %Temperature rise 70ocCooling class AANo. of phase 3Frequency 50 HzPolarity DyN1Insulation class FPrimary BIL 60 kVSecondary BIL 10 kVTap changer type Off loadWeight (core & coil) 15000 LBSWeight (total) 18500 LBSNeutl. gr. resist. 350 ohmsMax fault current 1 amp

3.7.4 1500 KVA OIL COOLED TRAX'MERMake ABB Type Silicon fluid insulated unit substation Trax'mer Surrounding Outdoor (40oc avg ambient with 50oc peak )KVA rating 1500 / 1680Temperature rise 45/55ocPrimary voltage 6600 voltsSecondary voltage 433 Y/250 voltsImpedance 7.89 %Cooling class OAPolarity Dyn1Insulating medium Silicon fluid, Insuladur insulationPrimary full wave impulse test 75 KvSec. Full wave impulse test 30kVTap changer type Off loadAdditional tap volts/Amps at 433 V/ 2240.1A on LV side

Tap No. Connects Volts HV Amp. HV1 4 to 5 6930 140.02 3 to 5 6765 143.43 3 to 6 6600 146.94 2 to 6 6435 150.85 2 to 7 6270 154.7

Liquid level at 25oc 8.69” below highest manhole flangeRise in level /10oc rise 0.30”Vol. Liquid 425 GallonWeight (core & coil) 5857 lbsWeight (case) 4295 lbsWeight (liquid) 3187 lbsWeight (total) 13339 lbsOperating Pr. ±6.5PSI(sealed air fluid preserving system)Design Pr. ± 8.0 PSINeutl. gr. resist. 350 ohms Max fault current 1 amp

3.7.5 2000 KVA OIL COOLED TRAX'MER Make ABB Type Silicon fluid insulated unit substation Trax'mer Surrounding Outdoor (40oc avg ambient with 50oc peak )KVA rating 2000 / 2240 kVATemperature rise 45/55ocPrimary voltage 6600 voltsSecondary voltage 433 Y/250 voltsImpedance 7.62 %Cooling class OANo. of phase 3

Frequency 50 HzPolarity DyN1Insulating medium Silicon fluid, Insuladur insulationPrimary full wave impulse test 75 kVSec. full wave impulse test 30kVTap changer type Off loadAdditional tap volts/Amps at 433 V/ 2986.6A on LV side

Tap No. Connects Volts HV Amp. HV1 4 to 5 6930 186.62 3 to 5 6765 191.23 3 to 6 6600 196.04 2 to 6 6435 200.95 2 to 7 6270 206.3

Liquid level at 25oc 9.78” below highest manhole flangeRise in level /10oc rise 0.33”Vol. Liquid 477 GallonWeight (core & coil) 6954 lbsWeight (case) 4847 lbsWeight (liquid) 3377 lbsWeight (total) 15378 lbsOperating Pr. ± 6.5 PSI(limited by sealed air fluid preservation)Design Pr. ± 8.0 PSINeutl. gr. resist. 350 ohms Max fault current 1 amp

3.7.6 415 /240 V Trax'mer KVA Rating 3kVAHV side voltage /current 415 v/ 7.2 ALV side voltage /current 240 v / 13 AFrequency 50 / 60 HzTemperature rise 80ocWeight 60lbsConnection HV side H1 – H2 394 volts

H1 – H3 405 voltsH1 – H4 415 voltsH1 – H5 425 voltsH1 – H6 435 volts

Connection LV side X1 – X2 240 volts

3.7.7 415 /110 V Trax'mer KVA Rating 2 kVAHV side voltage /current 415 v/ 5 ALV side voltage /current 110 v / 18 AFrequency 50 / 60 HzTemperature rise 80ocWeight 60 lbsConnection HV side H1 – H2 394 volts



3.7.8 415 /24 V Trax'mer KVA Rating 5 kVAHV side voltage /current 415 v/ 12 ALV side voltage /current 240 v / 24 AFrequency 50 / 60 HzTemperature rise 80ocWeight 60 lbsConnection HV side H1 – H2 394 volts



3.7.9 415 / 240 OR 110 OR 24 VOLTS Trax'mer Trax'mer Application

415 / 240 volt Distribution panel

MCC/Motor HTR

MCC/Motor HTR – 1HB

415 / 110 volt Test control Bus

Test control Bus – 1HB

415 / 24 volt Motor winding HTR

Motor winding HTR

3.7.10 LDB’S DATADesignation Charged from KVA Rating Lighting areaOLA OTA 100OLB 100OLC OTB 100OLD 100OLL 50OLG OSA 100OLP 50OLH OSB 100OLQ 50OLE OSC 100OLR 50OLF OSD 100OLS OSW 50OLM 1KB 50OLN 2KB 50OLU (DC) 0FAOLW (DC)

3.7.11 LDB TRANSFORMERTYPE F-12Rating 50 kVAVoltage (Pri/Sec) 415 V/433 VCurrent 69.56 A/ 66.67 APhase 3/3Frequency 50 HzNo. of switches 12Switch fuse unit 100 AType of cooling ANImpedance volts 3.25 %Vector group DyN11 Insulation level Primary Secondary

3 kV 3kVTotal weight 350 kgInsulation class FMax. temp rise of winding 70oc at 50oc amb.Off load Tap Tap No % Volts HV Volts LV

1 -5 395 4332 -2.5 405 4333 0 415 4334 +2.5 425 4335 +5 435 433

TYPE H-24Rating 100 kVAVoltage (Pri/Sec) 415 V/433 VCurrent 139.1A/133.4 APhase 3/3Frequency 50 HzNo. of switches 24Switch fuse unit 250 A (Incomer)Type of cooling ANImpedance volts 3.69 %Vector group DyN11 Insulation level Primary Secondary

3 kV 3 kVTotal weight 375 kgInsulation class FMax. temp rise of winding 70oc at 50oc amb.Off load Tap Tap No % Volts HV Volts LV

1 -5 395 4332 -2.5 405 4333 0 415 4334 +2.5 425 4335 +5 435 433

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